Linear phosphonitrilic oxygen terminated derivatives



United States Patent 3,249,635 LINEAR PHOSPHONITRILIC OXYGEN TERMINATEDDERIVATIVES Kazimiera J. L. Paeiorek, Riverside, Calif., assignor to theUnited States of America as represented by the Secretary of the Navy N0Drawing. Filed Sept. 13, 1963, Ser. No. 308,917 1 Claim. (Cl. 260-551)The invention herein described may be manufactured and used by or forthe Government of the United States of America for governmental purposeswithout the payment of any royalties thereon or therefor.

The present invention relates to a method for preparation of oxygenterminated phosphonitrilic derivatives of the general formula inparticular R2 (N=P z")uNH1 R2" described in this invention was preparedby V. V. Korshak et al., Vysokomolekulyarnye Soedineniya, II, No. 3,377-385 (1960), by the following reaction sequence:

NH4C1 (0 H1021? 013 o -0 (0 a s)2 (0 e 5) 212NH (C 0H5) However, theseparation :of the product from this reaction mixture is tedious andyields are uncertain. The present invention as disclosed herein is muchless complicated and the product can be isolated very readily.

It is an object of the invention to provide a new method for thepreparation of oxygen terminated phosphonitrilic derivatives of thegeneral formula Another object of the invention is to provide a newmethod for the preparation of (0 6H5)2]I5|'[N=P (C eHahhNHi (GaHQg Otherobjects and many of the attendant advantages of this invention willbecome readily appreciated as the same becomes better understood byreference to the following detailed description.

The starting material 3,249,635 Patented 'May 3, 1966 for this inventionis described in copending patent application Serial No. 308,916 filedSeptember 13, 1963, for Linear Substituted Phosphonitrilic Derivatives.

The invention disclosed herein is described in the following procedureused to prepare 1.5 g. of

o e 5)2 [N=P d t) 213 was treated with aqueous acetonitrile (refluxingC.)); filtered, then recrystallized from acetonitrile when 1.30 g.yield) of was obtained (M.P., 171-172 C.).

Calc. for C H P N O C, 70.67; H, 5.03; N, 5.12; P, 15.21; Mol wt. 815.Found: C, 70.04; H, 5.32; N, 5.22; P, 15.18; M01 wt. 810 (in benzene)using Mechrolab osmometer.

The overall reaction sequence can be represented as follows:

Obviously many modifications and variations of the present invention arepossible in the light of the above teachings. It is therefore to beunderstood that within the scope of the appended claims the inventionmay be practiced otherwise than as specifically described.

What is claimed is:

The method for preparing o (C 5H5) 2i [N=P (C fiHfihhN i (C 0115Mcomprising re acting (C sH5)2 [N= (0 u s)2]aCl with aqueous acetonitrileby refluxing to yield having a melting point of 171-172 C. whenrecrystallized from aoetonitrile.

No references cited.

WALTER A. MODANCE, Primary Examiner. HARRY I. MOATZ, Assistant Examiner.

